Water powered ram pump



FIG. 1 is a left side perspective view of a water pump showing my new design;

FIG. 2 is a right side perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view; and,

FIG. 5 is an enlarged detail of the waste valve assembly. 

The ornamental design for a water pump, as shown. 